the woman being beaten in that video, police say she is 48 years old, was sitting on her front stoop when the teenagers suddenly bounced on her, beat her with their fists, their feet and with a chair. their bizarre explanation, a police detective said it appears, quote, they just did it for fun. we'll spend some time with this shocking story tonight. there are urgent legal questions. but we're also trying to come to terms with this brutal and violent outburst that these girls inflicted on this woman. listen to some of the people involved in the case. >> they've been charged with aggravated assault and related charges, being held on $50,000 bail. >> my client never made any physical contact with the victim in this case. >> she did not throw any punches? >> no, she did not throw any punches. >> or throw anything at her?